Date: Sun, 22 May 2005 03:59:15 +0100 From: Bruce M Simpson <bms@spc.org> To: Stephan Uphoff <ups@tree.com> Cc: Colin Percival <cperciva@freebsd.org>, "freebsd-arch@freebsd.org" <freebsd-arch@freebsd.org> Subject: Re: Scheduler fixes for hyperthreading Message-ID: <20050522025914.GD1108@empiric.icir.org> In-Reply-To: <1116729865.1917.92.camel@palm> References: <428FC00B.3080909@freebsd.org> <1116729865.1917.92.camel@palm>
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On Sat, May 21, 2005 at 10:44:25PM -0400, Stephan Uphoff wrote: > Beside benchmarking - is there any other real use for RDTSC ? > Is there any use of RDTSC that system requiring the security cannot live > without? (We could even try to emulate the instruction if we really need > to) A number of ports use RDTSC for high-resolution timing. The most obvious examples being machine emulators mostly used for gaming (UAE and MAME spring to mind, possibly also dosbox and others). I daresay VMware probably uses RDTSC too. BMS
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